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                  <p><small><a
 name="file_archiving_compression_encryption_authentication"></a>PeaZip
is a free cross-platform file archiving, compression, backup, and
encryption utility that
provides an
unified
portable GUI for Open Source technologies like 7-Zip, FreeArc,
PAQ, UPX... free alternative to WinRar, WinZip </small><small>and
similar
proprietary software</small><small>.<br>
- Create 7Z, ARC, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP
files<br>
- Open and extract ACE, ARJ, CAB, DMG, ISO, LHA,
RAR, UDF, ZIPX files and more,</small><small> over 200 archive types
supported</small><small><br>
Features of PeaZip includes: </small><small> </small><small>archiving,
authenticated encryption, </small><small>batch creation and </small><small>extraction
                  </small><small>of multiple
archives at once, </small><small>convert files, </small><small>create
self-extracting archives, split and join files,
strong AES cryptography with two factor authentication, encrypted
password
manager, </small><small>secure deletion, </small><small>find
duplicate files, </small><small>calculate hash and checksum,
export job definition as script.</small></p>
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            <td colspan="1" rowspan="1" style="vertical-align: top;"> <br>
            <h1 style="text-align: center;"><big><big><big><a
 name="open_pea_files"></a>PEA file archiving, authenticated encryption
utility</big></big></big></h1>
            <br>
            </td>
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                  <div> </div>
                  <ul>
                    <li>
                      <p><a
 href="pea-archiving-utility.html#pea_archiver_software">PEA: PACK,
ENCRYPT, AUTHENTICATE</a></p>
                    </li>
                  </ul>
                  </td>
                  <td style="vertical-align: top; width: 128px;">
                  <h2><img title="PEA format compression and encryption"
 alt="free file archiving utility" src="file-format/archive-format.png"
 style="width: 96px; height: 96px;" align="right"></h2>
                  </td>
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            <td
 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <div style="text-align: left; color: rgb(0, 0, 0);">
            <h2><big><big><big><a name="pea_archiver_software"></a><a
 href="pea-archiving-utility.html#open_pea_files">PEA: pack,
encrypt, authenticate</a></big></big><br>
            </big></h2>
            </div>
            <br>
            <a name="data_encryption"></a>Pea executable is the engine
implementing <span style="font-weight: bold;">PEA
file format</span>
archiving, extraction, <a href="encrypt-files.html">file encryption</a>,
and <a href="extract-encrypted-files.html">file decryption</a>
routines; it
is
released as Open Source freeware program
under
LGPLv3 license.<br>
Pea file compression and cryptograpy utility can be compiled as a
cross-platform autocontained (portable) executable
that can be used from batch scripts or invoked by a GUI frontend like
PeaZip or it can be used also as library from external application; it
supports it's native .pea archive format and also raw file split / join
with optional integrity check ranging to CRCs to cryptographically
strong hashes, to detect treats ranging from casual file corruption to
malicious data tampering.<br>
            <br>
            <h2><img src="read-write.png"
 title="Work with PEA archive format"
 alt="open source cryptography software"
 style="border: 0px solid ; width: 800px; height: 39px;"></h2>
            <br>
You don't need a separate download for getting Pea archiving utility's
Windows / Linux executables, sources and documentation, since are part
of
the respective
PeaZip packages, available from download pages.<br>
            <br>
Read more: <a href="pea-file-format.html">what is PEA file format</a><br>
            <br>
            <div style="text-align: center;"><big
 style="font-style: italic;">Implementation details</big><br>
            </div>
            <big> </big><span style="font-weight: bold;"><br>
            </span>
            <h2><big><span style="font-weight: bold;">Archiving and
compression</span></big></h2>
            <div style="text-align: justify;"><br>
            <a name="file_archiving_and_compression"></a>Input data is <a
 href="what-is-zip-file.html">compressed</a>
with a Deflate-based compression scheme (PCOMPRESS) defined in PEA file
format
specifications, resulting in compression ratio and compression speed
similar to typical Deflate-based compressors of that class, like Zip,
PKZip, and GZip.<br>
Please note that at present stage of development of PEA format maximum
compression is out of the scope of the project; a fast and versatile
deflate-based compression scheme was used in order to offer a
reasonable tradeoff between compression ratio and speed to make PEA
suitable for most uses.<br>
For a standardised compression benchmark, including PeaZip's
compression ratio using PEA format, you can look at Matt Mahoney's <a
 target="_blank" href="http://www.mattmahoney.net/dc/">Large
Text Compression Benchmark<img title="Large Text Compression Benchmark"
 alt="file compressibility" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a><br>
            </div>
            <br>
            <br>
            <h2 style="font-weight: bold;"><big>Integrity check,
authentication
and encryption algorithms</big></h2>
            <div style="text-align: justify;"><br>
            <a name="verify_data_integrity"></a>PEA archive format
design is focused on security. Checksum / CRC, hash and
strong encryption algorithms are provided by cross-platform Wolfgang
Ehrhardt's
cryptography
library for Pascal/Delphi (released
under zlib license), to enforce
privacy of
input data (AES based encryption, optionally Serpent or Twofish), to
detect file corruption (checksum
and hash functions), and, with use of authenticated encryption, to
guarantee: secrecy (only intended recipient can read the data),
integrity (data transmission was not tampered), and authenticity (data
comes from expected sender).<br>
Supported algorithms ranges from fast CRC32 / CRC64 to mainstream MD5 /
SHA
hash, to robust cryptographically secure hashes like SHA3 and Whirlpool
(AES based 512 bit hash).<br>
            </div>
            <div style="margin-left: 80px; text-align: center;"><br>
            </div>
            <div style="text-align: center;"> </div>
            <table class="MsoNormalTable"
 style="border: medium none ; border-collapse: collapse; width: 600px; text-align: left; margin-left: auto; margin-right: auto;"
 border="1" cellpadding="0" cellspacing="0">
              <tbody>
                <tr>
                  <td
 style="border: 1pt solid windowtext; padding: 0cm 5.4pt; background: rgb(224, 224, 192) none repeat scroll 0% 50%; -moz-background-clip: initial; -moz-background-origin: initial; -moz-background-inline-policy: initial; width: 25%; font-weight: bold;"
 valign="top">
                  <p class="MsoBodyText" style="text-align: left;"
 align="left">Purpose</p>
                  </td>
                  <td
 style="border-style: solid solid solid none; border-width: 1pt 1pt 1pt medium; padding: 0cm 5.4pt; background: rgb(224, 224, 192) none repeat scroll 0% 50%; -moz-background-clip: initial; -moz-background-origin: initial; -moz-background-inline-policy: initial; vertical-align: top; width: 50%; font-weight: bold;">
                  <p class="MsoBodyText" style="text-align: left;"
 align="left">Algorithms<br>
                  </p>
                  </td>
                </tr>
                <tr>
                  <td colspan="2"
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; background: rgb(255, 255, 240) none repeat scroll 0% 50%; -moz-background-clip: initial; -moz-background-origin: initial; -moz-background-inline-policy: initial; vertical-align: top; width: 25%;">
                  <p class="MsoBodyText" style="text-align: left;"
 align="left">Pea: Object, Stream and Volume level; Raw file join/split
optional integrity check</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 25%;"
 valign="top">
                  <p class="MsoBodyText" style="text-align: left;"
 align="left">Checksum/CRC</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; vertical-align: top; width: 50%;">
                  <p class="MsoBodyText" style="text-align: left;"
 align="left">Adler32, CRC32, CRC64</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 25%;"
 valign="top">
                  <p class="MsoBodyText" style="text-align: left;"
 align="left">Hash</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 50%;"
 valign="top">
                  <p class="MsoBodyText">MD5, SHA1, RIPEMD-160,
SHA256,
SHA512, Whirlpool, SHA3-256, SHA3-512<br>
                  </p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; background: rgb(255, 255, 240) none repeat scroll 0% 50%; -moz-background-clip: initial; -moz-background-origin: initial; -moz-background-inline-policy: initial; width: 25%;"
 colspan="2" valign="top">
                  <p class="MsoBodyText">Pea: Stream level only</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 25%;"
 valign="top">
                  <p class="MsoBodyText" style="text-align: left;"
 align="left">Authenticated encryption<br>
                  </p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 50%;"
 valign="top">
                  <p class="MsoBodyText" style="text-align: left;"
 align="left">AES128 HMAC, AES128/256 EAX, Serpent 128/256 EAX, Twofish
128/256 EAX </p>
                  </td>
                </tr>
              </tbody>
            </table>
            <br>
            <h3 style="font-weight: bold;"><big>File
split
and join</big></h3>
            <br>
            <a name="file_spanning_tool"></a>Pea utility <a
 href="file-split.html">file spanning
(split and join)</a> features are compatible with most file
spliters
applications like HJSplit, 7-Zip, and split Unix command: simply
provide an input file to cut it into volumes of the desired
output size.<br>
Optionally Pea can save a control file containing checksum or hash (see
Control algorithm paragraph) of each volume and of the original file,
allowing file level and volume level integrity check, which will be
ignored by other file splitters utilities.<br>
Merging back the split file, Pea will check this control file and give
a simple warning if it's not found, i.e. because the file was split by
other file split application, or cast an error message if integrity
verification hash or checskum is not matching with expected values.<br>
            <br>
            <br>
            <h4><big style="font-weight: bold;">Standalone file
management features</big></h4>
            <br>
            <a name="file_management_tools"></a>Pea executable, other
than implementing extraction and archiving in
.PEA format, uses the internally supported features (encryption,
checksum/hash, randomness sampling etc...) to provide general file
management utility tools, not necessarily related with file archiving,
as in <a href="peautils-hash-secure-delete.html">PeaUtils</a> spin-off
utility:<br>
            <ul style="font-weight: bold;">
              <li><a href="secure-delete.html">secure data deletion</a>
(file data and free disk space)<br>
              </li>
              <li><a href="verify-checksum-hash.html">file checksum /
hash tool</a><br>
              </li>
              <li><a href="duplicates-hash-checksum.html">byte to byte
file compare tool</a><br>
              </li>
            </ul>
            <br>
            <br>
            <h4 style="font-weight: bold;"><big>How to compile</big></h4>
            <br>
Pea utility is compiled and built using Lazarus, a cross platform Open
Source RAD IDE
based on FreePascal, a language widely compatible with Delphi, Kylix,
ObjectPascal, capable to target Windows, Linux, BSD, Darwin and many
other platforms, as well as ARM, x86, x86_64 and many other
architectures.<br>
Sources are available from <a href="index.html">PeaZip download page</a>;
source packages contains instructions and documentation also for
compiling pea binary implementation.<br>
While pea binary comes precompiled only for MS Windows, Linux, and BSD,
Lazarus/FPC (and Wolfgang Ehrhardt's crypto library) targets a far
larger number of systems and architectures, so any help in porting pea
format and implementation on new platform is welcome.<br>
            <br>
            <div style="text-align: center;"><span
 style="font-style: italic;"><a
 name="Wolfgang_Ehrhardt_cryptographic_library"></a>Wolfgang Ehrhardt,
one of most influential Delphi developer, passed away in early 2019 [<a
 href="https://www.delphipraxis.net/200202-rip-gammatester.html">1</a>],
[<a href="https://forum.lazarus.freepascal.org/index.php?topic=45912.0">2</a>].
            </span><br style="font-style: italic;">
            <span style="font-style: italic;">His legacy is mathematic
and cryptographic code of impressive quality, generously released as
Open Source. </span><span style="font-style: italic;">This is a huge
loss for Delphi community and a sore loss for me. </span><span
 style="font-style: italic;">His was the first, and the best,
cryptographic library I used in Lazarus/FreePascal, and a natural
choice for a project as PeaZip.<br>
            </span><span style="font-style: italic;">May his work live
long and continue teaching and inspiring new generations of programmers!</span><br>
            </div>
            <br>
More online resources and information: <a target="_blank"
 href="https://en.wikipedia.org/wiki/Authenticated_encryption">authenticated
encryption<img
 alt="data confidentiality, integrity, authenticity assurance"
 title="authenticated encryption wiki" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>, <a
 target="_blank" href="https://en.wikipedia.org/wiki/EAX_mode">EAX mode<img
 alt="two pass authentication cipher"
 title="EAX authrnticated encryption" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>, <a
 target="_blank"
 href="https://en.wikipedia.org/wiki/Advanced_Encryption_Standard">AES
(Rijndael)<img alt="Joan Daemen, Vincent Rijmen algorithm"
 title="AES cipher" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a> encryption
algorithm, <a target="_blank"
 href="https://www.schneier.com/twofish.html">Twofish<img
 title="cryptographer Bruce Schneier" alt="twofish cipher"
 src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>, <a
 target="_blank"
 href="http://en.wikipedia.org/wiki/Serpent_%28cipher%29">Serpent<img
 title="cryptographers Ross Anderson, Eli Biham, Lars Knudsen"
 alt="Serpent cipher" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a> ciphers, <a
 target="_blank" href="http://en.wikipedia.org/wiki/Checksum">checksum/CRC<img
 alt="verify data integrity" title="CRC algorithms"
 src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a> and <a
 target="_blank" href="http://en.wikipedia.org/wiki/Hash_function">hash<img
 alt="compute hash value" title="File hashing"
 src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a> Wikipedia
pages, <a target="_blank" href="http://en.wikipedia.org/wiki/Deflate">Deflate<img
 alt="data compression" title="Deflate algorithm"
 src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a> algorithm
description on Wikipedia; software supporting PEA archives <a
 target="_blank" href="http://peaextractor.sourceforge.net/index.html">PeaExtractor<img
 alt="simple rar extractor application" title="PeaExtractor"
 src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a>, <a
 target="_blank"
 href="http://www.msfn.org/board/forum/159-universal-extractor/">Universal
Extractor<img alt="archive extraction program"
 title="Universal Extractor" src="free-rar/extractor.png"
 style="border: 0px solid ; width: 12px; height: 10px;"></a><br>
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suggestions about how to use Pea, Open Source free cryptography and
file archiving &amp; compression utility, supporting AES in EAX mode
for authenticated encryption, how to create and extract its native
format PEA: Pack Encrypt Authenticate
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compression,<br>
how to create pea archives, <br>
free pea extractor,<br>
compression software,<br>
authenticated encryption software,<br>
file hashing utility,<br>
file archiving utility,<br>
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and extract pea archives, <br>
pea format encryption, <br>
what is authenticated encryption,<br>
AES EAX mode encryption tool,<br>
download pea file extraction utility,<br>
file archival software,<br>
file checksum utility,<br>
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 style="vertical-align: top; width: 25%; font-style: italic;">add file
to pea archive, <br>
how to manage pea files,<br>
free file archiving software,<br>
PeaZip native archive format,<br>
deflate compression utility,<br>
encryption software,<br>
integrity check,<br>
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 style="vertical-align: top; width: 25%; font-style: italic;">how to
unzip pea files, <br>
open pea files, <br>
free aes encryption utility,<br>
free pea archiver utility,<br>
EAX mode AES cryptography,<br>
file management software,<br>
file split tool<br>
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            <td style="vertical-align: top;">Tag Cloud<br>
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            <td style="vertical-align: top; width: 25%;"><small> <img
 alt="cross platform encryption" src="titles.png"
 style="width: 129px; height: 2px;"><br>
            <a name="authenticated_encryption_software"></a>DOWNLOADS<br>
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 src="free-rar/extract-rar.png" style="width: 1px; height: 1px;"
 vspace="3"><br>
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PeaZip downloads</a><br>
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Portable</a><br>
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Linux/BSD</a><br>
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            <a name="authenticated_encryption_utility"></a>SUPPORT<br>
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Asked Questions</a><br>
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information</a></small><br>
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            <a style="color: rgb(0, 0, 0);"
 name="aes_eax_authenticated_encryption"></a>DONATE<br
 style="font-style: italic;">
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 src="free-rar/extract-rar.png" style="width: 1px; height: 1px;"
 vspace="3"><br style="font-style: italic;">
Support
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or donate to FAO,
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Feed</a></small></td>
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                  <td style="text-align: right; vertical-align: middle;"><small><a
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Wiki</a></small></td>
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 href="mailto:giorgio.tani.software@gmail.com">Developer email</a></small></td>
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 title="Mail developer | Giorgio Tani" src="free-zip/mail.png"
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 title="Search in PeaZip project domain"
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